Friction spring draft-rigging for railway-cars.



PATBNTED FEB. 14, 1905.

l P. N. MOORE. `FRIGTION SPRING DRAFT RIGGING FOR RAILWAY CARS.

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APPLIOATIORv FILED BBPT. 8. 1904.

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' PATENTED FEB. 14, 1905.

P. N. MooRR. FRIGTION SPRING DRAFT RIGGING PoR RAILWAY GARS'.

APPLIOATION FILED SEP'LS. 1904.

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PV# B WITNESSES; fJvn/naeuf UNITED STATES 'atented February 14, 1905.

PATENT OFFICE.

PETER N. MOORE, OF MILWAUKEE, VISOONSIN.

SPECIFICATION forming part of Letters Patent No. 782,793, dated February 14, 1905,

Application filed September 8, 1904i Serial No. 223,719.

To all LUI/1,0711, it hefty concern.'

Be it known that I, PETER N. MOORE, a citizen of the United States, residing' in Milwaukee, in the county of Milwaukee and State of Wisconsin, have invented a new and useful Improvement in Friction Spring Draft-Rigging for Railway-Cars, of which the following is a specification.

My invention relates to improvements in friction spring draft-rigging for railway-cars.

The object of my invention is to provide a friction spring draftrigging of a simple, strong, efficient, and durable construction capable of exerting a great frictional resistance in connection with a direct-acting spring resistance arranged in the line of draft.

My invention consists in the means I employ to practically accomplish this object or resultLthat is to say, it consists, in connection with the draw-bar, draw bar extension or strap, side plates or stop-castings, followers,

and a longitudinally-arranged spring, of two pair of friction-clamps, each pair havin'g inclined friction-surfaces between which an inclined friction member may be moved and a pair of longitudinally and transversely movable friction-slides, each having inclined friction-faces adapted to frictionally engage and slide between the inclined friction-faces of the friction-clamps. I

My invention also consists in the novel construction of parts and devices and in the novel combinations of parts and devices herein shown or described.

In the accompanying drawings, forming a part of this specification, Figure l is a central vertical longitudinal section of a friction spring draft-rigging embodying my invention. Fig. 2 is a horizontal section. Fig. 3 is a partial cross-section on line 3 3 of Fig. 2. Fig. 4 is a detail perspective View of one of the longitudinal and transversely movable friction-slides, and Fig. 5 is a detail perspective view of one of the friction-clamps.

In the drawings, A represents the draft or center sills of a car; A', the front or cross sill; C, the coupler; B, the draw-bar; and B, the draw-bar extension or strap, secured to the draw-bar by bolts or rivets 7).

D D are the side plates or stop-castings,

having front stops Z and rear stops d for the followers E E to abut against and integral Lipper guides Z2 and lower guides Z 3 for the followers to reciprocate on or between, the lower guides being' in the form of removable plates secured in place by bolts CZA1 to permit the ready insertion and removal of the draftrigging.

F is a longitudinally-arranged spring directly behind the draw-bar in the line of draft and having a small spring f nesting within it.

Gr G and (ir Gr are two pair of frictionclamps having oppositely-inclined frictionfaces g g', between which cooperating friction members may slide. The friction clamp Gr abuts against one of the followers and the friction-clamp G against one end of the spring F. One pair of friction-clamps is thus interposed between the spring and each follower.

H H are two longitudinally and transversely movable friction-slides, each having two inclined friction members or wings 7L, adapted to reciprocate between and frictionally engage the inclined friction-faces g g' of the two pair of friction-clamps G G. The longitudinall y and transversely movable frictionslides H H are each preferably of a semi-box shape with inclined ends, formed by the inclined friction members L /t or furnished with integral sides 7L /t to give strength to the friction-slide as a whole or brace and support its oppositely-inclined friction members it L. To guide and register the transversely and longitudinally movable friction-slides H H with each other in their transversely-reciprocating movement, these friction-slides are provided or preferably provided with interengaging transverse Guides 7a2 lf, the guides if on the.

one slide H fitting between the guides 71,3 ou the other slide H, as will be readily understood from the drawings. These interengaging transverse guides on the friction-slides H H not only guide the friction-slides in their transverse reciprocation in respect to each other, but also cause both friction-slides H H to reciprocate longitudinally together or in unison with each other as the draw-bar moves back and forth.

The two friction-clamps G' G', which abut directly against opposite ends of the spring IOO li W

F, are preferably provided with lugs /1/l to center the spring or hold it in place.

As the transversely and longitudinally movable friction-slides H H move between the parallel inclined friction-faces g g' of the friction clamps G G their inclined friction members /i are forced into close frictional engagement with and clamped between the friction-clamps, and thus exert very powerful frictional resistance.

The operation is as follows: In buing, the front follower E and front pair of friction-clamps G Gr move with the draw bar, while the rear follower and rear pair of friction-clamps are held stationary by the rear stops on the side plates or stop-castings D. while at the same time the friction-slides H H are caused to move both transversely in respect to the draw-bar and also longitudinally, thus causingthe inclined friction members /b i of the friction-slides H to frictionall y slide or reciprocate between the inclined friction-surfaces g lr/ of the friction-clampsGr G. In pulling, the operation is the same, but the reverse, the front follower and front pair of friction-clamps being now held stationary, while the rear follower and rear pair of friction-clamps move with the draw-bar.

I claiml. 1n a friction spring draft-rigging, the combination with the draw-bar, draw-bar strap or extension, longitudinally-arranged spring, followers and side plates or stop-castings, of two pair of friction-clamps, one pair between each follower and the spring, and each friction-clamp of each pair having oppositely-inclined friction-faces and a pair of transversely and longitudinally movable friction-slides, cach havinginclined friction memiff; 782,793

bers reciprocating between the parallel friction-faces of the friction-clamps,and said friction-slides being provided with interengaging guides to guide the transversely-reciprocating movement of said slides in respect to each other, and to cause the two slides to move together longitudinally, substantially as specified.

2. 1n a friction spring draft-rigging, the combination with a longitudinally -arranged spring and followers, of two pair of frictionclamps having inclined friction-faces and two longitudinally and transversely movable friction-slides having inclined friction members longitudinally'engaging the inclined frictionfaces of the friction-clamps, said friction-slides having interengaging guides to cause them to move together longitudinally and to guide their transverse reciprocation in respect to each other, substantially as specified.

3. In a friction spring draft-rigging, the combination with a longitudinally-arranged spring and followers, of a pair of frictionclamps between one end of thespring and one of the followers, each of said clamps having oppositely-inclined friction-faces and two longitudinally and transversely movable frictionslides having each an inclined friction member frictionally engaging the inclined friction-faces of said friction-clamps, said friction-slides having transversely-extending interengaging guides to cause said slides to move together longitudinally and to guide their transverse reciprocation in respect to each other, substantially as specified.

PETER N. MOORE. Witnesses:

PEARL ABRAMS, WILLIAM A. GEIGER. 

